Microcontroller MCQ Questions
This section focuses on "Microcontroller" in Microprocessor. These Multiple Choice Questions (MCQ) should be practiced to improve the Microprocessor skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations.
1. What is true about microcontroller?
A. A microcontroller is a small and low-cost microcomputer
B. It is designed to perform the specific tasks of embedded systems
C. microcontroller consists of the processor, the memory, Serial ports, peripherals.
D. All of the above
View Answer
Ans : D
Explanation: All of the above statement are true.
2. Which is false about microcontroller?
A. Microcontrollers are used to execute a single task within an application.
B. It consists of CPU, RAM, ROM, I/O ports.
C. Its power consumption is high because it has to control the entire system.
D. It is built with CMOS technology
View Answer
Ans : C
Explanation: It is built with CMOS technology, which requires less power to operate.
3. This type of microcontroller is generally used in automatically controlled appliances like automatic operational machines.
A. 8-bit microcontroller
B. 16-bit microcontroller
C. 32-bit microcontroller
D. 64-bit microcontroller
View Answer
Ans : C
Explanation: 32-bit microcontroller : This type of microcontroller is generally used in automatically controlled appliances like automatic operational machines.
4. This type of microcontroller is designed in such a way that they do not have a program memory on the chip.
A. External memory microcontroller
B. Embedded memory microcontroller
C. CISC
D. RISC
View Answer
Ans : A
Explanation: External memory microcontroller : This type of microcontroller is designed in such a way that they do not have a program memory on the chip. Hence, it is named as external memory microcontroller.
5. Which of the following is an example of Embedded memory microcontroller?
A. Intel 8031 microcontroller
B. Intel 8051 microcontroller.
C. Intel 8081 microcontroller.
D. Intel 8085 microcontroller.
View Answer
Ans : B
Explanation: Intel 8051 microcontroller is an example of Embedded memory microcontroller.
6. 8051 microcontroller is designed by Intel in?
A. 1980
B. 1981
C. 1982
D. 1983
View Answer
Ans : B
Explanation: 8051 microcontroller is designed by Intel in 1981. It is an 8-bit microcontroller
7. At what PIN number, there is a RESET pin, which is used to reset the microcontroller to its initial values?
A. PIN 9
B. PIN 20
C. PIN 30
D. PIN 35
View Answer
Ans : A
Explanation: Pin 9 : It is a RESET pin, which is used to reset the microcontroller to its initial values.
8. At what PIN number, there is EA pin which stands for External Access input?
A. PIN 28
B. PIN 29
C. PIN 30
D. PIN 31
View Answer
Ans : C
Explanation: Pin 30 : This is EA pin which stands for External Access input. It is used to enable/disable the external memory interfacing.
9. When pins are configured as an output (i.e. logic 0), then the single port pins can receive a current of?
A. 5mA
B. 8mA
C. 15mA
D. 10mA
View Answer
Ans : D
Explanation: When pins are configured as an output (i.e. logic 0), then the single port pins can receive a current of 10mA.
10. Which IO Port can be used for higher address byte with addresses A8-A15?
A. PORT1
B. PORT0
C. PORT3
D. PORT2
View Answer
Ans : D
Explanation: PORT2 : This port can be used for higher address byte with addresses A8-A15. When no memory is added then this port can be used as a general input/output port similar to Port 1.
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